JP2016507957A5

JP2016507957A5 -

Info

Publication number: JP2016507957A5
Application number: JP2015550791A
Authority: JP
Filing date: 2013-12-27
Publication date: 2017-07-13

Claims

A method for decoding video data, comprising:
When the current view is a dependent texture view, the current coding unit (CU) is not intra-coded, and the partition mode of the current CU is equal to PART_2N × 2N
Obtaining, by a video decoder, a weighting factor index of the current CU from a bitstream comprising a sequence of bits forming an encoded representation of the video data, wherein the current CU is a picture belonging to the current view When no partition of the current CU has a temporal motion vector or the disparity vector of the current CU is not available, the bitstream is the weighting factor index for the current CU. Conforms to a video coding standard that obeys the weighting factor index for the current CU to constraints requiring equality to a particular value;
Determining a weighting factor by the video decoder based on the weighting factor index;
Wherein not the current view is dependent texture view, or the current CU is intra-coded, or when the said division mode of the current CU is not equal to PART_2N × 2N, the weighting factor is the equal to the specific value, Assuming by the video decoder , where the weighting factor having the specific value indicates that no residual prediction is applied for the current CU;
In response to said weighting factor is determined not equal to the specific value, with the reference residual signal multiplied by the weighting factor, the residual signal for the current CU, by the video decoder , and to predict,
Using one or more prediction blocks of the current CU prediction unit (PU) and the residual signal by the video decoder to reconstruct a pixel block of the current CU .

A luma and chroma coded block flag (CBF) if no prediction unit (PU) in the corresponding block of the current CU is intercoded or no PU in the corresponding block of the current CU is equal to 0. ), The video coding standard obeys the residual prediction flag in the bitstream with a constraint that requires the residual prediction flag to be equal to zero, where it is equal to zero. The method of claim 1, wherein the residual prediction flag for the current CU indicates that residual prediction is not used for the current CU, and the corresponding block is in a reference view picture.

In response to determining that residual prediction is enabled for the current CU, and without determining whether at least one PU in the corresponding block of the current CU is not intracoded; and Further comprising obtaining, by the video decoder, the residual prediction flag from the bitstream without determining that the values of the luma and chroma CBF of the corresponding block of the current CU are not equal to zero. The method according to claim 2.

The video coding standard is a constraint that requires the illuminance compensation flag to specify a value indicating that illuminance compensation is not used for the current CU when no PU of the current CU uses an inter-view reference picture. The method of claim 1, wherein the illumination compensation flag in the bitstream is followed.

The current CU is currently in a slice;
The method is responsive to determining that illumination compensation is enabled for the current slice, and without determining whether at least one PU of the current CU uses an inter-view reference picture. The method of claim 4, further comprising : obtaining the illumination compensation flag from the video decoder, the illumination compensation flag indicating whether illumination compensation is used for the current CU.

The method of claim 1, wherein the specific value is equal to zero.

A method for encoding video data, comprising:
Receiving the video data by a video encoder;
In response to determining that the current view is a dependent texture view, the current coding unit (CU) is not intra-coded, and the partition mode of the current CU is equal to PART_2N × 2N, the encoded representation of the video data is Including, by the video encoder, data indicating a weighting factor index of the current CU in a bitstream comprising a sequence of bits to form , wherein the current CU is in a picture belonging to the current view When no partition of the current CU has a temporal motion vector, or when the disparity vector of the current CU is not available, the bitstream has a specific value for the weighting factor index for the current CU. The constraint that requires that the current C The compliant with weighting factors video coding standards conforming index for, wherein the weighting factor index for the current CU is the index of the weighting factors to be used for residual prediction, the weighting factor, Equal to the specific value indicating that no residual prediction is applied for the current CU;
In response to determining that the current view is not a dependent texture view, or the current CU is not intra-coded, or the partitioning mode of the current CU is not equal to PART_2N × 2N, from the bitstream, Omitting the data indicating the weighting factor index for a current CU by the video encoder ;
Based on the weighting factor not equal to the specific value,
Determining a reference residual signal by the video encoder;
Using the reference residual signal multiplied by the weighting factor to determine final residual data for the current CU by the video encoder;
Outputting the bitstream by the video encoder .

A luma and chroma coded block flag (CBF) if no prediction unit (PU) in the corresponding block of the current CU is intercoded or no PU in the corresponding block of the current CU is equal to 0. ), The video coding standard obeys the residual prediction flag in the bitstream with a constraint that requires the residual prediction flag to be equal to zero, where it is equal to zero. The method of claim 7 , wherein the residual prediction flag for the current CU indicates that residual prediction is not used for the current CU, and the corresponding block is in a reference view picture.

The video coding standard is a constraint that requires the illuminance compensation flag to specify a value indicating that illuminance compensation is not used for the current CU when no PU of the current CU uses an inter-view reference picture. The method according to claim 7 , wherein the illumination compensation flag in the bitstream is followed.

The current CU is currently in a slice;
The method
When illumination compensation is enabled for the current slice, data indicating the illumination compensation flag is included in the bitstream by the video encoder, and at least one PU of the current CU uses an inter-view reference picture 10. The method of claim 9, further comprising: regardless of whether the illumination compensation flag indicates whether illumination compensation is used for the current CU.

The method of claim 7, wherein the specific value is equal to zero.

A video decoding device comprising a memory and a video decoder implemented as a circuit or a combination of circuits and software , the video decoder comprising:
When the current view is a dependent texture view, the current coding unit (CU) is not intra-coded, and the partition mode of the current CU is equal to PART_2N × 2N
Obtaining a weighting factor index of the current CU from a bitstream comprising a sequence of bits forming an encoded representation of video data, wherein the current CU is in a picture belonging to the current view, and When no partition has a temporal motion vector or the disparity vector of the current CU is not available, the bitstream requires that the weighting factor index for the current CU is equal to a certain value Conforms to a video coding standard that obeys the weighting factor index for the current CU to the constraint to
Determining a weighting factor based on the weighting factor index;
Wherein when not current view is dependent texture view, or the current CU is intra-coded or the division mode of the current CU is not equal to PART_2N × 2N,, assuming the weighting factor is equal to the specific value Where the weighting factor index having the specific value indicates that no residual prediction is applied for the current CU.
In response to said weighting factor is determined not equal to the specific value, with the reference residual signal multiplied by the weighting factor, to predict the residual signal for the current CU,
A video decoding device configured to use one or more prediction blocks of the prediction unit (PU) of the current CU and the residual signal to reconstruct a pixel block of the current CU .

A luma and chroma coded block flag (CBF) if no prediction unit (PU) in the corresponding block of the current CU is intercoded or no PU in the corresponding block of the current CU is equal to 0. ), The video coding standard obeys the residual prediction flag in the bitstream with a constraint that requires the residual prediction flag to be equal to zero, where it is equal to zero. The video of claim 12 , wherein the residual prediction flag for the current CU indicates that residual prediction is not used for the current CU, wherein the corresponding block is in a reference view picture. Decryption device.

The video decoder is responsive to determining that residual prediction is enabled for the current CU, as well as determining whether at least one PU in the corresponding block of the current CU is not intra-coded. The residual prediction flag is obtained from the bitstream without determining that the values of the luma and chroma CBF of the corresponding block of the current CU are not equal to zero. The video decoding device according to claim 13 .

The video coding standard is a constraint that requires the illuminance compensation flag to specify a value indicating that illuminance compensation is not used for the current CU when no PU of the current CU uses an inter-view reference picture. 13. The video decoding device according to claim 12 , wherein the illumination compensation flag in the bitstream is followed.

The current CU is currently in a slice;
The video decoder is responsive to determining that illumination compensation is enabled for the current slice, and without determining whether at least one PU of the current CU uses an inter-view reference picture. 16. The illuminance compensation flag configured to allow one or more processors to obtain the illuminance compensation flag from the bitstream, wherein the illuminance compensation flag indicates whether illuminance compensation is used for the current CU. The video decoding device as described.

The video decoding device is:
Integrated circuit,
A microprocessor, or
Wireless handset
The video decoding device of claim 12, comprising at least one of:

The video decoding device of claim 12, further comprising a display configured to display the decoded video data.

The video decoding device of claim 12, wherein the specific value is equal to zero.

A video decoding device comprising a memory and a video decoder implemented as a circuit or a combination of circuits and software , the video decoder comprising:
In response to determining that illumination compensation is enabled for the current slice, and without determining whether at least one prediction unit (PU) of the current coding unit (CU) uses an inter-view reference picture An illuminance compensation flag indicating whether illuminance compensation is used for the current CU is obtained from a bitstream that includes a sequence of bits that conforms to a coding standard and forms an encoded representation of video data, wherein the video coding The standard provides a constraint that requires the illuminance compensation flag to specify a value indicating that illuminance compensation is not used for the current CU if no PU of the current CU uses an inter-view reference picture. Follow the illumination compensation flag,
Responsive to determining that illumination compensation should be performed for the current CU based on the illumination compensation flag, performing illumination compensation for the current CU, wherein illumination compensation is performed for the CU Doing comprises filtering a prediction signal of the PU of the current CU.
A video decoding device configured to use the prediction signal and residual signal of the PU of the current CU to reconstruct a coding block of the current CU .

The video decoding device of claim 20, wherein the value indicating that illumination compensation is not currently used for a CU is zero.

A video decoding device comprising a memory and a video decoder implemented as a circuit or a combination of circuits and software , the video decoder comprising:
Obtaining a residual prediction flag for a current coding unit (CU) from a bitstream that includes a sequence of bits that conforms to a video coding standard and that forms an encoded representation of video data, where
The residual prediction flag for the current CU equal to 0 indicates that no residual prediction is used for the current CU;
A luma and chroma coded block flag (CBF) if no prediction unit (PU) in the corresponding block of the current CU is intercoded or no PU in the corresponding block of the current CU is equal to 0. ), The video coding standard makes the residual prediction flag subject to a constraint that requires the residual prediction flag to be equal to 0;
The corresponding block is Ru Ah in the reference view picture,
Generate one or more motion compensated predictors;
Determining residual data signaled in the bitstream;
Residual prediction for the current CU is performed by the video decoder in response to determining based on the residual prediction flag that residual prediction is used for the current CU. It is,
As part of performing residual prediction on the current CU, the video decoder
Based on the disparity vector, locate the residual signal of the corresponding block;
Reconstruct the coding block of the current CU by adding the residual signal of the corresponding block to the one or more motion compensated predictors and the residual data signaled in the bitstream
A video decoding device configured as follows.

The video decoder is responsive to determining that residual prediction is enabled for the current CU, as well as determining whether at least one PU in the corresponding block of the current CU is not intra-coded. The residual prediction flag is obtained from the bitstream without determining that the values of the luma and chroma CBF of the corresponding block of the current CU are not equal to zero. Item 23. The video decoding device according to Item 22 .